Suppose a single electron orbits about a nucleus containing two protons (+2e), as would be the case for a helium atom from which one of the naturally occurring electrons is removed. the radius of the orbit is 2.99 × 10-11 m. determine the magnitude of the electron's centripetal acceleration.

Explanation:

In this case we will use the Bohr Atomic model.

We have that:

We can calculate the centripetal force using the coulomb formula that states:

Where K=

and r is the distance.

Now we can say:

The mass of the electron is = Kg

The charge magnitud of an electron and proton are=

Substituting what we have:

" alt="a=\frac{9*10^{9}*(1.6*10^{-19} )*(2(1.6*10^{-19} ))}{9.1*10^{-31}*(2.99*10^{-11})^2 }" />" />

so:

none, its a machine

the motion of a pendulum is a classic example of mechanical energy conservation. a pendulum consists of a mass (known as a bob ) attached by a string to a pivot point. as the pendulum moves it sweeps out a circular arc, moving back and forth in a periodic fashion.